Vehicle-tire.



Pf A. MAGOWAN.

VEHICLE TIRE.

'APPLIUATION FILED mm2, 190e.

Patented Feb.11,1913..

www m. mln-'veruit' UNITED STATES PATENT FRANK A. MAGOWAN, OF NEW YORK,

VEHICLE-TIRE.

Specification of Letters Yatent.

r-atentedreb.- .11, 1913.?

applicati@ medvJune 2, 190e. serial No. 319,847.

To all 'whom t may concern Be it known that I, FRANK A. MAGowAN, a citizen of the United States, residing'ein the borough' of Manhattan, New York city, in the county of New York and State of New York, have invented certain new and.

inflated, so that the tire ,is liable vto become too large for =the rim,'-`fand hence liable to slip oft. Moreover, owing to the great excessive lateral Iknea'diiig land pulling to which the tire is constantly subjected when in use, the plies of rubber forming the body of the tubular cover, are forcibly separated one from another, and this causes avery large portion of the troubles which are experienced by users. It is the practice in making t-hese bodies to employ al high grade of strong cotton duck, and to unite the plies by friction, which vulcanizes them together, but owing t-o the fact that. the duck absorbs a large amount of moisturefrom the atmosphere and retains the moisture during the construction of the tire, the heat of vulcanization causesthe retained moisture to turn into steam which seriously impairs the vulcanization of one ply to another, since the steam forms pockets which prevent the plies from adhering together. It is the practice to minimize this difficulty by. first heating the duck to expel the moisture; still an apparently perfect tire will often, after short use, develop unexpected weakness, due

v to the formation of steam in the duck while vulcanizing.

The objects of my invention are to reduce to a minimum the liability of the tire cover to longitudinal extension by reason ot the high compression of air in the tire, and

also to enable the cover to .withstand for an indefinite length of time the sidewise pulling to which it is constantly subjected in use without suffering any deterioration.

In carrying out my invention, I first form the body of the tire cover, that is the part which is made of cotton duck, by assembling the plies together in the usual manner, each ply being attached to the next by friction. The duck is cut bias, so that its threads run vcanized to one aneth ,pockets .between the diagonally ot' the ,-if"i'Vtflielifthe2v body is. completed,V 111tt. f .m

usualfform on which pl-1es together by' twine or copper wire',

the stitches prefera use.` I then `apply r fabric body, and in the usual manner, th canized .to the rubber,

stitched together. A'Th o canizfation can hayen'o u eque tri effect, because the pli stitches holdingthem., nil the tread of the tireviswornout;

'In the. accompanying drawings, Figure 1 is a sectional perspective view of a fragment of the body of a detachable tire cover. 8o made in accordance with my improvements. Fig. Z isan edge view of a tire body showing the stitchingv running helically around the same. Fig. 3 is a transverse section of a completed tire cover.- Fig. 4 isa longi- 35 tudinal section thereof. Fig. 'illustrates the manner of opening out the body to effect the stitching. Fig. 6 is a diagram illustrating the friction between the plies of duck.

I form a tubular body or foundation 1 90 for a detacli able tire by building the. same of numerous plies 2 of cotton duck or other fabric7 which are united by cement or friction as indicated diagrammatically by lines 3, Fig. 6. The duck is cut on the bias, so that the threads run diagonally around the tire, as indicated at 3, Fig. 1. The invention is illustrated as applied to a tire of the detachable type having an opening 4 along its inner or rim side, and flanges 100 5 along the edges at said opening for securing the tire upon the rim. The body 1s made upon a suitable form, and is then removed therefrom and stitched, preferably using a sewing machine that forms a lock stitch, so that there is little liability of stretching of the fabric along the lines of the stitches. The stitching is seen at 6, and extends in rows longitudinally of the tire body, that is around the rim of the wheel, and secures or mats all of lthe plies of duck firmly together. The stitching 111 opened out at the' point -Where thefstitching' the,; expansive' pressure 4of' airl withirrathev is being done, as at Fig..`5, so that the-sewin'gpnrlay conveniently be done upon a sewing machine. After the fabric body is stitched,"V itis replaced 'upon' lthe' -form, and `the usual rubbertrea'd'orfbuter 'wall 7 is applied therei.

'-toljiand'then'the whole is vulcanized in a 1,5'

or otherwisetx forni acompleted' tire oever,4 `By-employing copper lwire for the stitching, all liabilityfis avoided of det-erioration.. of the stitohes` by reason of at tacks of moisture, and thejstitches are not liable to be eut. The copper-,is flexible," so that it does not undulysti'fen the tireywhile v it suiliciently unyieldil'lg' l inl longitudinal direction to renderfthe-tire substantially inextensible in a: direction around the rim opfgthewl'leel. Owingito tse-xtreme longitudinal strength the tread portion or crown of;the"`tire'body is able litself .to' withstand tire, softhat the entire pressure ofair in ldirection radially of the' wheel is-notfsusj tained by the sides of the cover, asheretofore, and owing to` this reduction of the tendency vto burst 'the sides of the tire, a-

much greater air pressure may be employed in the tire than customary heretofore.` It will be seen that fewer plies than heretofore may be employed, thus relievingl the ireA of objectionable stiffness, while at the-same time the tire -will be stronger and more durable. l y Y v Having thus described my invention, I claim: 7 "l A ,L vf

l. As anew articlegof manufacture, an

Vendless` tubulargb'odyfor a tire cover, said body consisting' of Several plies of fabric held together by numerous rows of stitching, said rows extending longitudinally. of

the tirevand forming a helix extending around the tire.

2. As .a new varticle of xnanuaeturefan endless tubular body `for a. tire cover, said bodyconsisting of several plies of fabric "whose thread-S extend diagonally, around thetire, said plies stitched togetherby numerous ro'wsofl stitching extending longitudinally of; theftire. l

FRANK A. MAGOWAN.

/Vitnesses: Y

, B. C. STICKNEY,

Kri'rm FnA'NnFon'r. 

